Extrinsic 28488-1

{
  "heartbeat": {
    "blockNumber": 28487,
    "sessionIndex": 474,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x82d1a63009264284477da93d4f32ffa2074376f8c898cdddbb1da6ed8faabd1b6631e50604bec04a83f799b324e763e03e4f35ec3007f095f2b919dbb1f52d8e"
}